Hi, put a snap-on scanner on my gsi today & put it onto live data & the lambda sensor readings before the cat were going up & down as it should but the one after the cat was just sat at 451. Is the one after the cat meant to go up & down like the other one? Want to know weather my lanbda sensor is faulty.
Also are both sensors the same?
If so i could swap them over & see if the redings change.
Does anyone here know?